Canker sores are not contagious and are not related to the herpes simplex virus, also known as cold sores. Canker sores are thought to be caused by: Injuries to the mouth, as seen frequently by contact sports players. Accidentally biting the inside of the cheek or lip may also result in a canker sore.
Mexico has a population of 112,468,855 (July 2010 estimate) and its capital and largest city is Mexico City. Mexico is divided into 32 federal entities, of which 31 are states and one is a federal district. The following is a list of Mexico's 31 states and one federal district arranged by area. The population (as of 2009) and capital of each have also been included for reference.
This highland state's elevation is over 6,562 feet. Within the state's border lies La Malinche, Mexico's fifth-highest mountain at 14,637 feet. Although it is Mexico's smallest state, Tlaxcala is rich with tradition, history, and colonial architecture. One of its main attractions is Cacaxtla, an important archaeological site believed to have been built at the zenith of the Olmec Xicalanca culture around AD 700.